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Analog Devices - Photometric Front End

Numéro de référence ADPD103
Description Photometric Front End
Fabricant Analog Devices 
Logo Analog Devices 





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ADPD103 fiche technique
Data Sheet
FEATURES
Multifunction photometric front end
Fully integrated AFE, ADC, LED drivers, and timing core
Usable in a broad range of optical measurement
applications, including photoplethysmography
Enables best-in-class ambient light rejection capability
without the need for photodiode optical filters
Three 8 mA to 250 mA LED drivers
Separate data registers for each LED/photodiode
combination
1 to 8 optical inputs
Flexible, multiple, short LED pulses per optical sample
20-bit burst accumulator enabling 20 bits per sample period
On-board sample to sample accumulator, enabling up to
27 bits per data read
Low power operation
I2C interface and 1.8 V analog/digital core
Flexible sampling frequency ranging from 0.122 Hz to
3.820 kHz
FIFO data operation
APPLICATIONS
Body worn health and fitness monitors, for example, heart
rate monitoring
Clinical measurements, for example, SpO2
Industrial monitoring
Background light measurements
Photometric Front End
ADPD103
GENERAL DESCRIPTION
The ADPD103 is a highly efficient photometric front end with
an integrated 14-bit analog-to-digital converter (ADC) and a
20-bit burst accumulator that works in concert with flexible
light emitting diode (LED) drivers. It is designed to stimulate an
LED and measure the corresponding optical return signal. The
data output and functional configuration occur over a 1.8 V I2C
interface. The control circuitry includes flexible LED signaling and
synchronous detection.
The analog front end (AFE) features best-in-class rejection of signal
offset and corruption due to modulated interference commonly
caused by ambient light.
Couple the ADPD103 with a low capacitance photodiode of
<100 pF for optimal performance. The ADPD103 can be used with
any LED.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2015–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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